Device for thread reserve winding on cop winding machines



Dec. 30, 1941. w SCHWEITER 2,268,309

DEVICE FOR THREAD RESERVE WINDING ON COP WINDING MACHINES F1 led March 21, 1939 2 Sheets-Sheet 1 Fig.1

Hi II II H II: II II N4 \I III! W1 Ill J /n vemor: 141/ "Dec. 30, 1941. w. SCHWEITER DEVICE FOR THREAD RESERVE WINDING ON GO? WINDING MACHINES 2 SheetsSheet 2 Filed March 21, 1939 Patented Dec. 30, 1941 DEVICE F OR THREAD RESERVE WINDING COP WINDING MACHINES Walter Schwelter, Horgen, Switzerland Application March 21, 1939, Serial No. 263,276 In Germany June 28, 1938 13 Claims.

This invention relates to a device on cop winding machines for controlling the thread guide traverse so as to produce automatically a desired thread reserve winding or bunch on the cop, the object being to produce the bunch with regularity and precision so that it will be uniform on all the cops wound and therefore best suited for use in the loom, and the invention also relates, but is not limited, to means whereby the operator may control at will either the number of the layers forming the bunch or the extent of such layers, or both, so as to control the length of the yarn in the reserve.

An embodiment of the invention is illustrated by way of example in the accompanying drawings, in which:

Fig. 1 shows the gear box in longitudinal section,

Fig. 2 is a horizontal section of Fig. 1 taken below the driving shaft,

Fig. 3 is a section on line 3-3 of Fig. l, the grooved segment being shown in the position for normal thread guide traverse,

Fig. 4 shows the grooved segment with holder and change over device in the position they cupy during the formation of the thread reserve,

Fig. 5 is a similar view to Fig. 4 showing the parts in fully swung out position,

Fig. 6 shows the locking and change over de vice in longitudinal section,

Fig. '1 shows in front elevation the hand lever for setting the parts for making the reserve winding.

A driving shaft i is journalled in a gear box 2 and carries on its rear end a friction disc 3 which is driven in the usual manner by a driving wheel 4. The driving shaft I carries on its front end a driver head 5 which holds a cop or tube 6 and imparts its rotary motion thereto. A spur wheel I keyed on the driving shaft i within the gear box 2 drives a spur wheel 8 directly connected on one side with a cam drum 9 and on its other side with a spur wheel l0. These gear parts 8, 9, it are rotatably mounted on a rock shaft H between two adjustable stop rings 52 and 13. The shaft H is journalled in the gear box 2 and carries at its front end a lever 15 fixed by a pin M and having an abutment to which in normal position bears against a set screw H which is screwed into a projection E8 on the gear box 2 and which in its extreme swimg out position bears age '0 a projection H on the gear box 2.

A two-armed holder 20 is keyed on the shaft i l within the box 2 and carries two trunnion pins 2! and 22 as bearings for a grooved segment 23. This grooved segment 23 has in the middle on the inner side of the curve a pin 24 on which a crowned guide roller 25 is rotatably mounted and guided in the cam groove 26 of drum 8. The shaft i! is always turned into the position for normal thread guide traverse (Fig. 3) by the helical spring 42 hooked at one end in the stop ring 53 and at the other end in a bearing boss 43 in the gear box 2, i. e. is turned until the stop IE on the lever 15 bears against the set screw II.

A lever 29 is oscillatably mounted on a pin 28 fixed in the box 2 by a set screw 27, into which lever a pin 32 is pressed on which a crowned guide roller 3i is rotatably mounted to be actuated by the grooved segment 23. The lever 29 has at its upper end a slot 32 in which a pin 33 engages which is rigidly connected with a sleeve 36. The sleeve 34 is fixed by a set screw 35 on a thread guide rod 36 so that, by the oscillating movement of the lever 29 the thread guide 36a is reciprocated. It is pointed out that the grooved segment 23 is in fact a lever having its fulcrum axis at the trunnions carried by the holder 20. It is oscillated by the cam groove 26 and imparts its oscillation to the lever 29 through the roller 3i. Rotating the holder 26 shifts the fulcrum of lever 23 toward and from the roller 3| thereby changing the effective lever arm ratio of such lever 23 and accordingly changing the amplitude of oscillation imparted to the lever 29 and thread guide member.

The spur wheel it rigidly connected with the spur wheel 8, drives a spur wheel 31 which is rotatably mounted on a pin 38 fixed in box 2. The spur wheel 3'? has an eccentric hub 39 embraced by a lever Mi keyed on a shaft 4!, so that at the rotation of the spur wheel 3? the shaft it must carry out a rocking movement. The shaft d! also carries a control lever 46 on which a iJ-shaped plate ll provided with a pawl 46 is pivotally mounted by means of a screw 45. The pawl Mi cooperates with the teeth of a ratchet wheel 58 rotatably mounted on the hub 49 of a spur wheel 52 which in turn is rotatably mounted on shaft d i.

The ratchet wheel '58 has teeth on only about rd of its circumference and a concave recess 51 opposite the toothed portion. On a pin 52 in the ratchet wheel 58 a pull spring 53 is hooked, the other end of this spring engaging on a hook 54 in box 2. The pin 52 extends into a slot 55 in the spur wheel 56 (Fig. 6) so that the rotation of the ratchet wheel 68 is limited in both directions by the ends of slot 55. The spur wheel 50 meshes with a spur wheel 56 whose shaft 51 is joumalled in box 2. A knob 56 is pinned on shaft 51 outside the box. This knob 58 can be turned by hand and is held in its adjusted positions by a ball 66 loaded by a spring 56 and engaging in recesses 6| in knob 58. By turning the disc 56 the spur wheel 50 with its slot 55 is rotated so that the abutments for pin 52 are shifted in one or other direction.

A sector 63 is adjustably fixed on the holder 26 by means of a screw 62 and cooperates with the ratchet wheel 48 and its concave recess for the purpose of locking and releasing the position for the formation of the thread reserve. A boss 64 is cast on the holder 20. This boss, in the position shown in Fig. 5, contacts with the lower part 65 oi! the plate 41 and thus disengages the nose 46 from the ratchet wheel 48.

Assuming that an empty cop has been engaged to the driver head 5, which may be done by hand or automatically as will be understood, and that the driving shaft l is in action, the lever 5 is thrown over against its limit stop l9, against the torsion of its spring 42. This rocks shaft, and the holder to a position in which the axis of -the trunnions 2|, 22 is close to the cam bowl 3| of the lever 29 which reciprocates the thread guide 36. In consequence, the amplitude of oscillation of lever 29, i. e. the traverse of the thread guide 36, is relatively small; that is to say, suitable for winding a short layer of yarn on the cop to form the reserve winding or bunch.

The rocking of the holder 20 to this bunchwinding position has involved the contact of the boss 64 with the lower part 65 of pawl plate 41 and this lifts the pawl 46 so as to allow the ratchet wheel to turn to a predetermined position, such as shown in Fig. 5, under the influence of its ratchet spring 53.

When the lever I5 is released its return movement (by the spring 42) is stopped or interrupted by the abutment of the (concaved) end of the sector 63 upon the surface (toothless part), of the ratchet wheel. This is the position indicated in Fig. 4. The boss 64 has withdrawn from the pawl plate allowing the pawl 46 to drop into engagement with the ratchet wheel. The parts remain in this position for the length of time that is required for the pawl action to turn the ratchet wheel to the position in which its recess 5| faces the sector 63 and permits it to pass it and continue its returning movement. Such continued returning movement carries the trunnion axis, 2| and 22, to a position giving greater amplitude of oscillation to the lever 29, that is, a greater traverse to the thread guide 36. Fig. 3 shows this condition, the amplitude being maximum, but the amplitude is adjustable, being determined by the setting of the abutment screw l1, against which the lever |5 strikes, and by which its returning movement, and of the holder 20 and sector 63, is stopped.

The time required for the pawl action to move the recess 5|, the upper edge of which is essentially a trigger element, to its sector-releasing position is determined by the number of ratchet teeth which lie behind the pawl 46 when that pawl reengages the wheel, it being noted that the pawl is operated rather slowly through reduction gearing 31, I0, 8 and 1. Assuming that, say, five teeth lie behind it, the recess 5| will not release the sector 63 until the pawl has made five picks (five teeth) on the ratchet and thus brought the recess to releasing position. During this period the traverse oi the thread guide will correspond to the position of the trunnion axis which gives but a short stroke, as required for bunch-building, and it will be noted that the length of the stroke, which means the length of the yarn layers of which the bunch is formed, is determined by the adjustment of the sector 63 on holder 26 by means of the screw and slot 62 (Fig. 4). It is to be noted also the friction of the sector upon the ratchet wheel holds it stationary between the picks or strokes of the pawl. For this purpose the end of the sector is concaved as shown.

Selection of the number of teeth lying behind the pawl 46; that is to say, selection of the duration of the reserve winding period is made by the setting of the knob 56, which sets the wheel 56 and thereby sets the position of the slot 55 in that wheel in which the ratchet wheel stud 52 is confined. One end of this slot forms the stop for the ratchet wheel and limits the extent to which the spring can turn the ratchet wheel when released in the manner above described, that is to say, it is the means of predetermining the position of the ratchet wheel. I

Turning the knob in one direction brings the stopping of the ratchet wheel with less or no teeth behind the pawl,.while turning it in the other direction brings about its stopping with more teeth behind the pawl. In the one case, only a few or no layers of yarn will be wound on the cop to form the bunch and in the other case, more layers will be wound. It may be noted that the control of the number of layers, or thickness of the bunch, is effected by a simple external adjustment not requiring stopping the machine. The pawl 46 continues in motion after the bunch has been wound, but at such time its action is ineffective since, with the sector restored, there are now no means for holding the ratchet wheel in the position to which the pawl pushes it; it therefore merely oscillates with the pawl at such times.

After the trigger element represented by the edge of recess 5| has been pushed around by the pawl to its releasing position, the ratchet spring 53 is distended as shown in Fig. 3 and the parts are held in this position by the pawl 46 until the latter is again lifted by the boss 64 whereupon the ratchet wheel returns to the extent permitted by the position of slot 55 of the setting wheel. 50, thus clearing it for the next operation of thelever l5. It will be obvious therefore that the lever l5, or its equivalent, can be connected by a lever arrangement, such as indicated at 66 in Fig. '7, with the control shaft 61 of a fully automatic cop winder to the end that as soon as the empty' cop has been received in the driver head said lever is thrown over toward its abutment l6, thus building the bunch at the start of each cycle of the machine.

The means by which the operator can select the number of ratchet teeth that are behind the slow moving pawl 46, when the machine starts on a cycle, represents the timing means referred to in the claims, being so termed because the purpose is to hold the holder 20 of the lever |5 in its bunch building position for a long enough period of time to build any selected bulk of bunch upon the cop.

I claim:

1. Device for cop winding machines for adjusting the thread guide traverse, and producing a thread reserve winding, comprising in combination a rotary cam drum, :1 segment having a cam roller adapted to be oscillated by said drum about an axis perpendicular to the axis of said drum, means for turning the segment about the axis of said drum, a traverse rod and a means carried by said rod and engaging said segment to impart a reciprocating motion to said rod at the oscillation of said segment.

' 2. In a device as specified in claim 1, a shaft carrying the cam drum, a holder mounted to rotate concentrically with said shaft, carrying the segment and adapted to determine the axis of oscillation of said segment, a sector adjustably mounted on said holder, a change over device adapted to cooperate with said sector to lock said holder in its adjusted position for a predetermined adjustable period for the reserve winding, and to automatically release the holder at the end of this period, and a spring adapted to return said holder with said segment into the initial position.

3. In a device as specified in claim 1, a shaft carrying the cam drum, a holder mounted to rotate concentrically with said shaft, carrying said segment and adapted to determine the axis of oscillation of said segment, a sector adjustably mounted on said holder, a wheel whose periphery is formed by a toothed portion, a smooth portion and a concave recess, a pawl engaging said toothed portion, means for oscillating said pawl to rotate said wheel, said smooth portion forming an abutment for said sector to maintain said holder in its adjusted position, and a spring adapted to pull said sector into said recess to return said holder with said segment into their initial positions.

4. In a device as specified in claim 1, a shaft carrying the cam drum, a holder mounted to rotate concentrically with said shaft, carrying said segment and adapted to determine the axis of oscillation of said segment, a sector adjustably mounted on said holder, a wheel whose periphery is formed by a toothed portion, a smooth portion and a concave recess, a pawl engaging said toothed portion, means for oscillating said pawl to rotate said wheel, said smooth portion forming an abutment for said sector to maintain said holder in its adjusted position, a spring adapted to pull said sector into said recess to return said holder with said segment into their initial positions, and manually operated means for adjusting the initial position of said wheel to determine the length of the thread reserve.

5. In an automatic cop winder, a traversing thread guide member, means for adjusting the traverse stroke thereof and means for holding said means in a predetermined stroke adjustment position comprising a trigger element and a power driven device for moving said trigger to releasing position.

6. In an automatic cop winder, a traversing thread guide member, means for controlling the length of the traverse thereof adapted to be shifted from normal position to bunch building position against spring action, a trigger element to hold it in the latter position, and means for actuating the trigger element comprising a ratchet wheel and a driving pawl therefor, the point of beginning of the pawl driving action being variable.

'1. In a cop winde having a traversing thread guide member, a thread-guide-operating shaft and operating connections extending therefrom to said member for traversing the latter, said connections including a lever and having means for changing the effective lever-arm ratio of such lever, to change the length of stroke imparted thereby to said member, said changing means being movable from a long-stroke position to a short-stroke position, means for shifting it from its latter position after a predetermined reserve-winding period, and means for restoring it to said position.

8. In a cop winder having a thread guide mem-. ber, a thread-guide-operating shaft, a lever oscillated by the rotation of said shaft, connecting means between said lever and said member for traversing the latter, a movable holder for said lever adapted by its movement to change the relation of the fulcrum of said lever with respect to said connecting means, means for automatically moving said holder in opposite directions, and means for retaining said holder in one of its positions for a reserve-winding period.

9. In a cop winder having a traversing thread guide member, a thread-guide-operating shaft and operating connections extending therefrom to said member for traversing the latter, said connections including a leverand having means for changing the effective lever-arm ratio of such lever, tochange the length of stroke imparted to said member, said changing means being movable and subject to pressure urging it to one position, a trigger element adapted to hold it against such pressure, a timing device for actuating said element after a predetermined period to release said changing means, and means for restoring said changing means.

10. In a cop winder, a thread guide member, a thread-guide-operating shaft, a lever oscillated by the rotation of said shaft, connecting means between said lever and said member for traversing the latter, a movable holder for said lever adapted to change the relation of said levers fulcrum with respect to said connecting means and being subject to a pressure urging it in one direction, means for holding it against such pressure comprising a trigger element, a timing device adapted for actuating said element to release said holder after a reserve-winding period, and means whereby the return of said holder resets said timing device.

11. In a cop winder, a thread guide member, a thread-guide-operating shaft, a lever oscillated by the rotation of said shaft, connecting means between said lever and said member for traversing the latter, and a movable holder for said lever for changing the relation of its fulcrum with respect to said connecting means, said holder being subject to pressure urging it in one direction, means for holding it against such pressure comprising a trigger element, means for adjusting the position of said holder with respect to said connecting means when held by said element, and a timing device adapted to actuate said element to release the holder.

12. A cop winder of the kind defined by claim 8 in which said lever oscillates on an axis that is transverse to said shaft and in which the holder for said lever is mounted to turn on an axis concentric with said shaft.

13. A cop winder having the construction defined in claim 8 in which the means for retaining the lever holder in reserve-winding position in,- cludes a trigger element, a ratchet wheel for moving said element and a driving pawl for rotating said wheel. I

WALTER SCHWEITER. 

